9.5mm SATA HDD SSD Hard Disk Drive Caddy per Acer Aspire ES1-520 ES1-521 ES1-531 ES1-711 ES1-711G ES1-731 ES1-731G F5-571G - AliExpress
Putting SSD into Aspire ES1-132-C8WF — Acer Community
Reddit, I opened up my Acer Aspire One (ES1-132) recently in the hopes of upgrading the 32GB SSD. It turns out the SSD is eMMC so it is soldered to the motherboard.